Question

Mark 7 and -1 on the number line and find out the difference between them.

Answer 1

Hint: To solve the question given above, we will first find out what is a number line. After that we will draw a number line and write integers at sufficient distance on the number line. Then we will calculate the total number of integers between -7 to 1 after marking them on the number line. The difference between them will be equal to the total number of integers between them plus one.

Complete step-by-step answer:
Before we solve the question given above, we must know what is a number line. A number line can be defined as a straight line with numbers placed at equal intervals or segments along its length. A number line can be extended infinitely in any direction and is usually represented horizontally. Now we will make a number line and write integers at equal intervals. Thus, we have the following number line:

Here, as we can see, we have drawn a number line and we have marked integers from -4 to 13. Now, we have to find the difference between 7 and -1. For this, we will first calculate the total number of integers between 7 and -1. The integers between 7 and -1 are: 0, 1, 2, 3, 4, 5, 6. So there are a total of seven integers between 7 and -1.The difference between 7 and -1 can be calculated by adding 1 to the total number of integers between them. So, we have:
Difference between 7 and -1= Total number of integers between them+1
 Difference between 7 and -1= 7+1
 Difference between 7 and -1= 8

Note: In the number line drawn above, we have only mentioned the integer because 7 and -1 both are integers, so we can also write an integer. In place of integers, we can write any real number line. No matter what the type of real number we have written, the difference between 7 and -1 will remain the same.